Introduction and application of Nitrile Rubber 丨Acrylonitrile Butadiene (NBR)
Nitrile Butadiene Rubber (NBR) is a kind of synthetic rubber. It is a copolymer made of acrylonitrile and butadiene monomers. It has excellent oil resistance (especially alkane oil), high wear resistance and gas resistance. It has the advantages of good tightness, good heat resistance, strong adhesion, and good aging resistance. The disadvantages are poor low temperature resistance, poor ozone resistance, poor insulation, and slightly low elasticity, so it is not suitable for use as insulation materials.
Key Properties and Characteristics
| Durometer (Shore A) | 40-90 | Tear Strength | Fair | |
| Specific Gravity (Polymer) | 1 | Flame Retardent Properties | Poor | |
| Tensile Strength Max-psi (Mpa) | 2500(-17.3) | Weathering Characteristics | Fair to Poor | |
| Low Temperature Brittle Point (C/F) | 0.85 | Oxidation Resistance | Good | |
| Resilience | Good | Ozone Resistance | Fair | |
| Compression Set | Good | Oil Resistance | Excellent | |
| Heat Aging | Good | Acid Resistance | Good | |
| Abrasion Resistance | Good | Resistance to Alkali Substances | Good | |
| Key Characteristics | ||||
| Oil and fuel resistance. | ||||
| Further Comments | ||||
| At temperatures up to 100°C or, with special compounding, up to 120°C, nitrile rubber provides an economic material having a high resistance to aliphatic hydrocarbon oils and fuels. From the different grades available, the higher the acrylonitrile (ACN) content, the higher the oil resistance, but the poorer the low temperature flexibility. It has high resilience and high wear resistance but only moderate strength. It has limited weathering resistance, and poor aromatic oil resistance. It can generally be used down to about -30°C, but special grades can operate at lower temperatures. | ||||
Different types of Nitrile Rubber 丨Acrylonitrile Butadiene (NBR)
| Items | NBR 3352 | NBR 3345Z | NBR 3345 | NBR 3355 | NBR 3365 |
| ML(1+4)100℃ | 47-57 | 38-48 | 38-48 | 47-57 | 57-67 |
| Volatile matter/% ≤ | 0.50 | 0.50 | 0.50 | 0.50 | 0.50 |
| Ash content(Ash)/% ≤ | 0.75 | 0.75 | 0.30 | 0.30 | 0.30 |
| Bound Acrylonitrile content (Bound Acrylonitrile), % | 33.0±1.5 | 33.0±1.5 | 33.0±1.5 | 33.0±1.5 | 33.0±1.5 |
Package and transportation of Nitrile Rubber 丨Acrylonitrile Butadiene (NBR)
Package: 1KG/25kg/
Transportation: by courier/ by air/ by sea
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